Toronto - Air Quality Health Index
2Low Risk
Moderate Risk
(4-6)
High Risk
(7-10)
Very High Risk
At-Risk Population:
- Enjoy your usual outdoor activities.
- Find out if you are at risk
General Population:
- Ideal air quality for outdoor activities.
Thursday
Thursday night
Friday
Friday night
Who is at risk?
People with heart and lung conditions are most affected by air pollution.
To find out if you are at risk, consult the health guide, your physician, or your local health authority.
Visit the national AQHI Web site to learn more about the AQHI.
Did you know...?
Air pollution makes asthma symptoms worse, such as coughing, wheezing, tightness in the chest and shortness of breath.
The AQHI is an initiative between Environment Canada, Health Canada and the Province of Ontario.

Observed ConditionsFootnote †
2 - Low Risk
Calculated at:
7:00 AM EDT Thursday 26 May 2022
Forecast Maximums
Issued at:
6:00 AM EDT Thursday 26 May 2022
The AQHI is an initiative between Environment Canada, Health Canada and the Province of Ontario.
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